As the U.S. and Russia take the first steps to drill for oil and gas in the Arctic Ocean, experts say the harsh climate, icy seas, and lack of infrastructure means a sizeable oil spill would be very difficult to clean up and could cause extensive environmental damage.

With the Keystone XL and other pipeline projects running into stiff opposition, Alberta’s tar sands industry is facing growing pressure to find ways to get its oil to market. One option under consideration would be to ship the oil via an increasingly ice-free Arctic Ocean.

The U.S. Congress is preparing to vote on expediting the Keystone XL pipeline. But plummeting oil prices and opposition to other proposed pipelines for tar sands oil are upending the rationale for this controversial project.

The oil slick spreading across the Gulf of Mexico has shattered the notion that offshore drilling had become safe. A close look at the accident shows that lax federal oversight, complacency by BP and the other companies involved, and the complexities of drilling a mile deep all combined to create the perfect environmental storm.

As climate and energy legislation continues to founder in Washington, Senator Maria Cantwell says it’s time for a new strategy. In an interview with Yale Environment 360, Cantwell explains why her bill can avoid the pitfalls of cap-and-trade and win the support of the public.